3D model reveals secrets of metastasis A cancer cell breaks from a primary tumor and settles in a new location, where it once more divides. Pharmaceutical companies typically make use of simplistic two-dimensional assays for this process, which is called metastasis, to judge anti-tumor therapeutics ed treatment reviews . In these assays, cells crawl over the surface area of a matrix, traveling in a single plane. But a fresh study indicates that this approach misses some essential phenomena. Employed in the labs of Whitehead Member Paul MIT and Matsudaira professor Douglas Lauffenburger, postdoctoral researcher Muhammad Zaman discovered that cells move quite in 3 dimensions differently.